耐候高强度螺栓钢耐典型工业大气环境腐蚀性能研究  

Study on the Corrosion Resistance of Weathering High Strength Bolted Steel in Typical Industrial Atmospheric Environment

作　　者：于强 朱思远 王舒蕊 王青峰[1] 顾晓勇 张瑞 杨照军 YU Qiang;ZHU Si-yuan;WANG Shu-rui;WANG Qing-feng;GU Xiao-yong;ZHANG Rui;YANG Zhao-jun(School of Materials Science and Engineering,Yanshan University,Qinhuangdao 066004,China;China Railway Shanqiao Group,Shanhaiguan 066000,China;Nanjing Iron&Steel Co.Ltd.,Nanjing 210000,China;Anhui Changjiang Fastener Co.Ltd.,Lu'an 237000,China)

机构地区：[1]燕山大学材料科学与工程学院,河北秦皇岛066004 [2]中铁山桥集团,河北山海关066000 [3]南京钢铁股份有限公司,江苏南京210000 [4]安徽长江紧固件有限责任公司,安徽六安237000

出　　处：《材料保护》2023年第4期38-45,共8页Materials Protection

基　　金：国家重点研发计划资助项目(2017YFB0304800/2017YEB0304802);安徽省科技重大专项(202003a05020037)。

摘　　要：为了研究耐候高强度螺栓钢在典型工业大气环境下的腐蚀行为,从自制的10.9级耐候螺栓中取样,与35VB螺栓对比,进行周期为24,48,96,168,216 h的模拟典型工业大气环境周期浸润加速腐蚀试验,采用腐蚀失重、XRD、SEM、电化学测试等分析试验方法,研究耐候高强度螺栓钢在模拟工业大气环境下的腐蚀行为。结果表明:10.9级耐候螺栓钢和35VB螺栓钢的腐蚀失重量均随腐蚀周期的延长而增加,10.9级耐候螺栓钢的失重量明显低于35VB螺栓钢;随腐蚀周期的延长,10.9级耐候螺栓钢和35VB螺栓钢的腐蚀产物的衍射峰强度均增大,并且在相同腐蚀周期下,10.9级耐候螺栓钢中α-FeOOH相的衍射峰较强;在相同周期下,10.9级耐候螺栓钢与35VB螺栓钢相比,自腐蚀电位较正、自腐蚀电流密度较小,且容抗弧较大,说明加入了Cu、Cr、Ni合金元素的10.9级耐候螺栓钢在典型工业大气环境中具有较为优异的耐蚀性。In order to study the corrosion behavior of weathering high strength bolted steel in typical industrial atmospheric environment,samples compared with 35 VB bolts were taken from the industrial trial production of 10.9 grade weathering bolts to carry out the simulated periodic infiltration accelerated corrosion tests of typical industrial atmospheric environment for 24,48,96,168,and 216 hours.The corrosion behavior of high strength bolted steel with weathering resistance in simulated industrial atmosphere was studied by means of corrosion weight loss,XRD,SEM and electrochemical test.Results showed that the corrosion weight loss of both grade 10.9 and 35VB bolted steels increased with the prolongation of corrosion cycle,and the weight loss of grade 10.9 weathering bolted steel was significantly lower than that of grade 35VB bolted steel.With the prolongation of corrosion period,the diffraction peak strength of the corrosion products of the 10.9 grade weathering bolted steel and 35VB bolted steel increased,and the a-FeOOH phase diffraction peak was stronger in the 10.9 grade weathering bolted steel under the same corrosion period.Under the same period,compared with 35VB bolted steel,the self-corrosion potential of 10.9 grade weathering bolted steel was more positive,the self-corrosion current density was smaller,and the capacitance resistance arc was larger.The results indicated that the 10.9 grade weathering bolted steel with the addition of Cu,Cr and Ni alloy elements possessed excellent corrosion resistance in typical industrial atmospheric environment.

关 键 词：10.9级耐候螺栓 典型工业大气环境 周期浸润腐蚀试验 耐蚀性 

分 类 号：TG174[金属学及工艺—金属表面处理]